Calculate N! / K!

// Write a program that calculates n! / k! for given n and k (1 < k < n < 100). Use only one loop.

import java.math.BigInteger;
import java.util.Locale;
import java.util.Scanner;

public class _06_CalculateN_K_FactorialsDivision {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Locale.setDefault(Locale.ROOT);
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a whole positive number in the range [3 .. 99] for N: ");
        int numN = scanner.nextInt();
        System.out.print("Enter other whole positive number in the range [2 .. N-1] for K: ");
        int numK = scanner.nextInt();
        scanner.close();

        if (numN < 100 && numN > numK && numK > 1) {
            BigInteger factorialsDivision = BigInteger.ONE;
            for (int i = numN; i > numK; i--) {
                BigInteger numBig = new BigInteger("" + i);
                factorialsDivision = factorialsDivision.multiply(numBig);
            }

            System.out.println("The Result from Division of N! and K! factorials is: "
                            + factorialsDivision);
        } else {
            System.out.println("Error! - Invalid Input!!!");
        }
    }

}